Bicycle-brake



(No Model.)

P. P. STANLEY. BIGYGLB BRAKE.

HE mzmms vzrzas co. mcm-umo" WASHINDYON, o. c.

ATENT tribe.

FREDERICK P, STANLEY, OF GICERO, ILLINOIS, ASSIGNOR TO HOGAN D. GQSBY, OF CHICAGO, ILLINOIS.

BICYCLE-BRAKE.

SPECIFICATION forming part of Letters Patent No. 597,031, dated January 11, 1898.

Application filed March 8, 1897. b erial No. 626,496. (No model.)

To all whom, it may concern.-

Be it known that I, FREDERICK P. STANLEY, a citizen of the United States, residing at Cicero, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Bicycle-Brakes, of which the following is a full, clear, concise, and exact description, reference being had to the accompanyin g drawings, forming a part of this specification.

My invention relates to a brake more particularly adapted to bicycles, its object being to provide a brake which will effectively check the motion of the bicycle without acting upon the tire of the wheel.

In accordance with myinvention in the preferred construction I provide a brake with two tire-encircling levers pivoted back of the crank-hanger of the frame and in front of the rear wheel and above the lower tubes of the bicycle-frame, with the braking ends adapted to be pressed against the rim of the rear wheel on both sides between the tire and the spokes, and with vertical links on the other end there of connected with an operating-rod, in connection with suitable mechanism operated by a handle-lever on the steering-head, whereby in operating the brake the engagement of the links on the forward end of the brake-levers tends to counterbalance the downward pull of the wheel on the other (brake-shoe) ends of the brake-levers to produce thereby an effective, easily operated, and reliable braking action.

In the accompanying drawings, Figure l is a view of a bicycle equipped with the brake of my invention. Fig. 2 is a plan view of the brake, showing the tire and the rim of the wheel in section. Fig. 3 is a view of the brake attachment from beneath. Fig. 4 is a sectional view on line 4 i, Fig. 3. Fig. 5 is a side view, and Fig. 6 an end View, of one of the collars of the brakeoperating mechanism. Fig. 7 is a view of the handle for operating the brake. Figs. 8 and 9 are views of a modi fication in which a sleeve is attached to the bicycle-tube, to which the collar is pivoted.

Like letters refer to like parts in the several figures.

The plate a of the brake attachment rests upon the rods b 19, extending from the barrel b of the frame, to the hub of the rear wheel 0, which is secured in position by means of a block a, which is clamped against the under sides of the rods h b by means of the bolts a C62. A screw a passes through the block a and rests by one end against the barrel 1) and by the other end against the cross-piece 19 between the rods 1) b. Ahead a is provided on the screw, whereby it may be turned to move the'platea back and forth to adjust the same in position and accommodate an y change in the length of the driving-chain that may be made. Upon the plate a are pivoted the brake-arms Z2 Z1, adapted to rock upon the journal-pin (1 To the ends of the arms are pivoted the links d d, the opposite ends of which are pivoted to the operatingnod (15.

By depressing the rod d the arms are thrust apart by the links to rock the brake-arms upon their pivot and bring the brake-shoes e 6' into engagement with the rim 0' of the rear wheel 0. The brake-shoes may consist of the ends of the arms I) h or may be separate blocks secured thereto, or, preferably, short tubes of rubber fitting over the ends of the arms and renewed from time time as they wear away. The arms I) b are curved, so as to fit about the tire 0 without rubbing against the same. It oftentimes happens that the rear wheel does not run true, the rim being displaced to the right or the left of the position illustrated. The swiveling of the brakearms upon the pivot (1 permits the brake arms to swing back and forth to engage the rim in any position it may occupy. The rod (1 is pivoted at the upper end to permit the necessary lateral movement. The links connecting the ends of the brake-arms with the operating-rod constitute a toggle-joint where by any force exerted upon the operating-rods imparts a greatly-magnified pressure to the brake-arms to press the ends apart and force the brake-shoes into contact with the rim. The friction of the rim upon the brake-shoes tends to force the ends of the brake-arms downward at one end, while the operatingrod forces the opposite ends downward, thus relieving the brake-arms of any tendency of being thrown out of position.

The upper end of the operating-rod d is journaled to the collar h, surrounding the tube is ofthe frame and pivoted thereto at h, the pivotsh and h permitting a limited lateral movement of the rod d to accommo date theswiveling of the brake-arms when the rim of the wheel is out of alinement.

The opposite end of the collar carries an arm h, to which is attached a rod Z, the opposite end of which is pivoted to the end of a similar collar m, surrounding and pivoted upon the tube 70 of the frame. The arm n of this collar is connected with a rod 0, attached at the upper end to the brake-handle 0, pivoted to the handle-bar 0 The rod 0 comprises a rod 0 extending into a'shell or' tube 0 and locked in any position therein by a set-screw o ,v whereby the length of the rod may be varied as the handle-baris raised and lowered. 1

When it isdesired to throw on the brake, the brake-handle is raised. The collar on is thus rocked upon its pivot, and through the rod lrocks the collar h to depress the operating-rod d and move the brakesshoes into engagement with the rim of the wheel. A

spring it may be providedfor depressing the naled, a sleeve 1), Fig. 8, maybe clamped about the tube by screws 1)" p, the sleeve carv rying inthe sides holes 19 f, in which fit the lugsr 0-, carried on the inner edges of the ring T, which is made in two halves adapted to be clamped together by screws 7' r The lugs 4" r" act as journals upon which the ring may rotate.

Having described my invention, what I claim as new and desire to secure by Letters Patent, is

1. In abicycle-brake, the combination with the lower tubes of thebicycle-frame, of a as-is the, pull of the wheel upon vthe brakeshoe ends of the brake-levers, substantially as described.

v 2. In a bicycle-brake the combination with the frame of the bicycle of a pair of horizontal tire-encircling hrake-levers pivoted back of the cranbhanger and above the lower tubes and having the ends or brake-shoes arranged to be pressed upon the opposite sides between the tire and the spokes of the rear wheel, and a pair of vertically-extending links connected with anoperating-lever and connected respectively to the forward ends of the brakedevers and a lever h pivoted to the upright tubing hthe rear end of which lever engages the end of the operating-rod connected with thelinks, and the other end of which is connected by suitable operating mechanism with an operating-lever, substantially as described.

In witness whereof I have hereunto subscribed my name in the presence of two wit nesses.

FREDERICK P. STANLEY. \Vitnesses:

H. H. ROCKWELL, M. A. ROCHFORD. 

